Minimum 20 is OK.. we ran into 11 MiB. (Why?)
test createBundle() and source deletion
createBundle - don't delete on specific path
Added createBundleExistsAsDirFails
Delete file after testing
close after test
Common helper to open/close/delete fs
close bundles
@Before/@After-style close/delete of zipfs
Use helper's @Before/@After tempfs
delete temp files
Delete temp files/dir on exit
Delete temp-files to avoid 'filling up' %TEMP%
Use 'fs' from Helper
close bundles
close bundles using @after@before methods
Make close() idempotent and implement Closable rather than AutoClosable
Helper method to get aggregation for a file
a toString method for the aggregation
Test reading back as JSON-LD

Requires json-ld from 
https://github.com/jsonld-java/jsonld-java with patch
https://github.com/jsonld-java/jsonld-java/pull/55
(in order to load the @context correctly)